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18673 (1998 FH66)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018673
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09321653481358914 3.1926e-08  
a 3.250144628201187 1.7388e-08 au
q 2.947177408317271 1.0621e-07 au
i .2171244692672933 3.3765e-06 deg
node 250.0540724821476 0.0011631 deg
peri 39.89359464012445 0.0011633 deg
M 264.1845072943114 2.3011e-05 deg
tp 2459966.120609164505
(2023-Jan-21.62060916)
0.00013712 TDB
period 2140.190625842778
5.86
1.7174e-05
4.702e-08
d
yr
n .1682093154006956 1.3498e-09 deg/d
Q 3.553111848085103 1.9008e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1894  
   data-arc span      11100 days (30.39 yr)  
   first obs. used      1991-01-12  
   last obs. used      2021-06-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5237  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:03:04  

Additional Information
 Earth MOID = 1.93053 au 
 Jupiter MOID = 1.58875 au 
 T_jup = 3.175 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.67   n/a MPCxxxxx  
diameter diameter 9.908 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18673 (1998 FH66)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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